Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 1 (Q.No. 1)
Directions to Solve
In each series, look for the degree and direction of change between the numbers. In other words, do the numbers increase or decrease, and by how much
1.
Look at this series: 2, 1, (1/2), (1/4), ... What number should come next?
Answer: Option
Explanation:
This is a simple division series; each number is one-half of the previous number.
In other terms to say, the number is divided by 2 successively to get the next result.
4/2 = 2 2/2 = 1 1/2 = 1/2 (1/2)/2 = 1/4 (1/4)/2 = 1/8 and so on.
Discussion:
210 comments Page 19 of 21.
Ibraz khan said:
8 years ago
@Shubham.
Keep taking the difference
15. 105, 315, 693, 1728, at last, you will get 48 common. By solving it we get the answer 2145.
Keep taking the difference
15. 105, 315, 693, 1728, at last, you will get 48 common. By solving it we get the answer 2145.
Sandeep Kumar said:
8 years ago
Let me tell you.
As you know that term of geometric progression.
a/r, a, ar, ar2.
So if we write in this form ar, a, a/r, a/r2.
Where a =1 (Constant) and r=2 (Common Ratio).
i.e it can be written 2, 1, 1/2, 1/4, 1/8.
As you know that term of geometric progression.
a/r, a, ar, ar2.
So if we write in this form ar, a, a/r, a/r2.
Where a =1 (Constant) and r=2 (Common Ratio).
i.e it can be written 2, 1, 1/2, 1/4, 1/8.
Sagarika Mahapatra said:
8 years ago
Nice explanations. Thanks all.
Mohan said:
8 years ago
Nice explanation, thanks.
Suryanarayan mishra said:
7 years ago
Thanks all for explaining.
Amresh sinha said:
7 years ago
Very nice explanation. Thanks all.
Sameer said:
7 years ago
Nice explanation. Thanks all.
Chandana said:
7 years ago
Thanks all for explaining.
Neha said:
7 years ago
Thanks all for your explanation it's very helpful for me.
Soumi Poddar said:
7 years ago
Thanks for explaining it.
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